In a twisted way, it creates dubcon for the *player* by deciding it's not OOC for the *character* when they think it is: the player is not consenting to the scene. Even if you portray the in game avatar as enthusiastic, some people will get the ick. Hence, the easiest fix for the largest amount of people with triggers is probably to (optionally) minimize the D/s. I'm on PC, so I'm not sure what console players have for options mod wise, maybe still none.

There are a vast amount of reactions for players to have in regards to Astarion: can't challenge him Lae'Zel style on who's the sub either lol. Afraid my current Durge would whoop his ass for assuming.